DXF Group Codes
OBJECTS Section
IDBUFFER

The following group codes are used by IDBUFFER objects.

IDBUFFER  group codes
Group codes Description

0

Object name (IDBUFFER)

5

Handle

102

Start of persistent reactors group; always "{ACAD_REACTORS"

330

Soft-pointer ID/handle to owner dictionary.

102

End of persistent reactors group, always "}"

100

Subclass marker (AcDbIdBuffer)

330

Soft pointer reference to entity (multiple entries may exist)

The IDBUFFER object is a utility object that is just a list of references to objects.